75 hp Evinrude issues

[kadehamilton]

I have a 1981 evinrude 75 hp the model number is E75ERLCIH. I have purchased the tach whip that plugs into the remote and when I start the engine it reads the rpms. but if it gets above 3000 rpms it falls out, after a few mins or so it will start working again. what would be causing this?? I have pulled the flywheel, and it looks good; the stator though seems original and has a little melting it looks like on the wraps. another issue, there is trim on it, but there are no relays. I have a blue and green wire. i can put 12v+ to one and ground the other it will move, swap them around on the battery and it will reverse the motor and go the opposite way. can anyone tell me or show me a diagram on wiring them up to relays?